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Hello,
This is my first post, so let me tell you first that I was really glad to find such a forum, where I coud find a lot of valuable informations
Going to my point :
My family lives in what was an old abbaye, almost totally destroyed today, but where there might still be some caves, and galleries.
There is actualy one cave that goes 10 meters down, surely a quarry for the chalk, that became after a cave. In that cave they started to dig two galleries, but those go nowhere after a few meters.
A couple of years ago, a hole appeared in the soil, 30 meters far from the entrance of the first cave, in the middle of nowhere (it does not correspond to anything in particular on the few old maps we have).
It is a squared hole, 1 meter wide, 1 meter long, and maybe 1.5 meters depth. Actualy the hole might have been obstructed with soil.
I wanted to dig in it, as I thought it might be some aeration for a gallery, but my family did not want me to touch anything. (too dangerous they said)
Also, an other story : there's high chance that there was a crypt under the church (some old texts talk about it), but we don't know if it was destroyed or if it still there.
So here I am today, trying to figure out how to see beneath the soil, and see if there's a crypt, some caves, some galleries, or nothing at all.
I want to construct the resistivity meter that John Becker wrote about in 2003. I have the Pdf, and I understood the principle. I bought the electronics part, I think that I might be able to build it, and learn how to use it.
But I have some wonders that came after buying everything :
- I bought some capacitor as said in the pdf : 1 and 10 microF, but rather than 16V I could only found 50V. Does that matters ? Is it just because the technology improved and that we have 50V rather than 16V today, or is it essential to get 16V ?
- The soil I am trying to explore is mostly made of chalk. Is it a problem to detect large voids ? I am afraid that the resistivity of chalk won't allow me to see anything...
- I've seen many time that people use a resistivity meter with a commutator, and a large amount of electrodes , so that the capture takes far less time (rather than having to connecte/disconnect wires for each measure). What do I need to build such a system, and is there any ressources out there ?
Ok tell me what you think
Thank you
-Thomas
This is my first post, so let me tell you first that I was really glad to find such a forum, where I coud find a lot of valuable informations
Going to my point :
My family lives in what was an old abbaye, almost totally destroyed today, but where there might still be some caves, and galleries.
There is actualy one cave that goes 10 meters down, surely a quarry for the chalk, that became after a cave. In that cave they started to dig two galleries, but those go nowhere after a few meters.
A couple of years ago, a hole appeared in the soil, 30 meters far from the entrance of the first cave, in the middle of nowhere (it does not correspond to anything in particular on the few old maps we have).
It is a squared hole, 1 meter wide, 1 meter long, and maybe 1.5 meters depth. Actualy the hole might have been obstructed with soil.
I wanted to dig in it, as I thought it might be some aeration for a gallery, but my family did not want me to touch anything. (too dangerous they said)
Also, an other story : there's high chance that there was a crypt under the church (some old texts talk about it), but we don't know if it was destroyed or if it still there.
So here I am today, trying to figure out how to see beneath the soil, and see if there's a crypt, some caves, some galleries, or nothing at all.
I want to construct the resistivity meter that John Becker wrote about in 2003. I have the Pdf, and I understood the principle. I bought the electronics part, I think that I might be able to build it, and learn how to use it.
But I have some wonders that came after buying everything :
- I bought some capacitor as said in the pdf : 1 and 10 microF, but rather than 16V I could only found 50V. Does that matters ? Is it just because the technology improved and that we have 50V rather than 16V today, or is it essential to get 16V ?
- The soil I am trying to explore is mostly made of chalk. Is it a problem to detect large voids ? I am afraid that the resistivity of chalk won't allow me to see anything...
- I've seen many time that people use a resistivity meter with a commutator, and a large amount of electrodes , so that the capture takes far less time (rather than having to connecte/disconnect wires for each measure). What do I need to build such a system, and is there any ressources out there ?
Ok tell me what you think
Thank you
-Thomas
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